Plumber s trap



(No Model.)

T. MoI-IUGH.

PLUMBERS TRAP.

No. 425,339. Patented Apr. 8Q1890.

\A/lTglas Ei 1 M? UNITED STATES Arnrrr Fries.

TIMOTHY MCIIUGH, OF \VAKEFIELD, ASSIGNOR OF ONE-HALF TO TIIE SMITH it: ANTHONY STOVE COMPANY, OF BOSTON, MASSACHUSETTS.

PLUMBERS TRAP.

SPECIFICATION forming part of Letters Patent No. 425,339, dated April 8, 1890. Application filed October 1'7, 1889. Serial No. 327,353. (No model.)

To all whom it may concern: part of this spccificatioinFigure 1 represents Be it known that I, TIMOTHY MCIIUGH, of a side elevation of a trap embodying my in- W'akefield, in the county of Middlesex and vention. Fig. 2 represents a longitudinal State of Massachusetts, have invented certain section of the same. Fig. 3 represents a secnew and useful Improvements in Plumbers tion on line 3 3, Fig. 1. Fig. 4. represents a Traps, of which the following is a specification. top View of the external ring which surrounds This invention relates to a plumbers trap the lateral opening in the trap.

composed of a lead body having its mouth or The same letters of reference indicate the other orifice surrounded by a hard-metal ring, same parts in all of the figures. 1o externally screw-threaded for engagement In carrying out my invention I take for with an internally-threaded cap. the body a of the trap a section of lead pipe,

The object of the invention is to provide a which has been. formed by the usual drawing trap of this class in which the inner surface process. Said section may be closed at one of the lead body shalhbe smooth and seamor both ends by spinning operation, whereby [5 less throughout and devoid of solder joints the said ends are turned inwardly until they or protuberances, and in which the screw form nearly complete heads a, which maybe threads of the cap-engaging ring shall be so completed by the use of solder. protected by the lead body of the trap as to 17 represents the hard-metal ring which surbe inaccessible to the liquid contents of the rounds the orifice or mouth 0 of the trap, said 2o trap when the cap is in place, so that there ring being externally screw-threaded. In will be no liability of corrosion or sticking case said orifice is located in the side of the together of the screw-threads of the ring and trap the ring D is made concave at its inner cover by the formation of verdigris or other edge, as shown in Fig. 4t, to fit the convex matter thereon. periphery of the trap-body. Said ring is 25 The invention consists in a trap composed placed upon the periphery of the body, and of a lead body, which is a section of lead pipe the material of the body within the circumof suitable diameter formed or drawn after ferenee of the ring is perforated and turned the usual method of making lead pipe, an outwardly by a suitable metal spinning tool externally-screw-threaded ring of hard metal or tools, the trap being held by a suitable. 8c 30 placed upon the exterior of said body, secured chuck and rotated about an axis or center of thereto by an extension of the lead body passrotation, which is at the center of the ring I). ingthroughtheringandhaving an outwardly- The concave edge of the ring enables it to projecting flange bearing on the outer edge closely fit the periphery of the body, so that of the ring, said extension being formed by the inner surface of the ring extends to the 3 5 spinning the portion of the lead body comsurface of the body all around the ring, and posing it against the inner surface and outer forms a support for the neck 2, formed by end of the ring. The extension is therefore turning outwardly a portion of the body a integral with the body of the trap and conagainst the inner surface of the ring, said stitutes a lining and an end washer or packneck being formed by pressing the material 0 4o ing-seat for the external ring, so that when of the body within the ring closely against the hard-metal cap or cover is screwed to the inner surface of the ring by a suitable place it will bear on the flange or seat portion tool while the trap is being rotated, as above a of said extension and form a liquid-tight described. The outer end of the neck 2 is joint between theinteriorof the trap and the turned outwardly over the outer end of the 5 45 screw-threaded surface of the external ring, ring I), and forms an outwardly-proj eeting thus preventing the access of the contents of flange or lip 3, which is integral with the neck the trap to the screw-threads and the stick- 2 and constitutes a lead seat or packing, on ing of the cap to the ring, which would result which the inner surface of the cap or cover if the acids, alkalies, &c., in the trap were ald bears when the latter is screwed to place o lowed to reach the said screw-threads. on the ring. Said seat, being of lead, yields Of the accompanying drawings, forming a suliiciently to the pressure of the cap against it to conform perfectly to the inner surface of the cap, and thus make a tight joint,preventin g the access of anyliquid orother matters in the trap to the screw-threaded surfaces of the ring and cap. There is, therefore, no liability of the corrosion of said screw-threaded surfaces or the formation of verdigris thereon, the screw-threads being kept clear and bright, so that the cap can be readily unscrewed without the employment of force su'fficient to twist or distort and injure the lead body of the trap.

It will be seen that by the employment of the ring I), made concave at its inner end and thereby closely fitted to the periphery of the trap, I am enabled to form the lateral opening in the trap entirely by spinning or turning outwardly the material of the trap within the ring, and at the same time to secure the ring to the trap-body and form a permanent seat or packing for the cap or part that is detachably secured to said ring. A lateral opening surrounded by a hard-metal screwthreaded ring is thus provided wholly without the use of solder, so that the inner surfaces of the trap and neck are devoid of protuberances, such as would be formed if solder were employed to secure the hard-metal ring to the trap-body.

By forming the neck 2 and flange or seat 3 by the spinning process, the material of said neck and flange is compacted and condensed, so that there is no liability of flaws or fissures therein, as there would be if the neck and flange were formed by casting.

By the employment of lead pipe, as described, I obtain a body the walls of which are condensed and compacted by the usual lead-pipe-formin g operation.

I claim I 1. A plumbers trap composed of a lead pipe body having an orifice, an externally-screwthreaded hard-metal ring surrounding sald orifice, a spun lead lining or neck closely fittlng the inner surface of said ring, and a spun lead flange or seat bearing on the outer end of said ring, the said neck and flange being integral with each other and with the body, and serving both to protect the inner surface and outer end of the ring and to secure said ring to the body of the trap, as set forth.

2. A plumbers trap composed of a lead-pipe body having an orifice, an externally-screwthreaded hard-metal ring having inner concaved edges fitting the trap, a spun lead lining or neck fitting the inner surface of said ring, and a spun lead flange or seat bearing on the outer edge of said ring, the said neck and flange being integral with the body, substantially as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 5th day of September, A. D. 1889.

TIMOTHY MOHUGH.

WVi-tnesses: O. F. BROWN, A. D. HARRISON. 

